What about packing and printing ink?
The main reason is that ink tends to:(1) the ink dries too quickly;(2) poor ink flow;(3) the deposition of ink has dried.But does not know that this phenomenon is due to the volatilization of the ink system, or evaporation, or oxidation drying gradient caused by large, and the printing industry is of the view that the ink or ink barrel structure, which retained part does not flow, the air leakage from the dryer drying surface or hot hair blown to the ink fountain the resulting ink.
Yufeng printing ink manufacturers recommend the following three methods:Method 1: adding anti oxygen and retarder. In the printing ink system, the function of adding antioxidants or retarders is to prevent the formation of free radicals in the process of printing and printing films, thus achieving the purpose of interrupting the oxidation and volatilization polymerization of the ink film. Once the solvent is volatile in a very short period of time, the oxidation of the oil is reduced, and the free radicals produced by the ink will continue to polymerize into membranes.Method two: adding oxygen barrier. Using liquid paraffin is called oxygen separating agent is added to the printing ink for packaging, to generate steam filled between the ink barrels, cans, boxes, to form a layer of oxygen insulation layer (film), so as to effectively prevent from vapor pressure and easily evaporate the solvent in the ink system.Method three: adding complexing agent. For a long time, packaging printing ink add anti skinning agent (i.e. polymerization), has a history of fifty years, nearly forty years, most of the phenols, and in the selection of ink in benzoic acid, compared with the earliest use of high boiling point solvent cover saves time and effort. With the development of science and technology, people have found that the use of oxime compounds as ink anti skinning agent in recent years has found that the effect of formaldehyde and methyl ethyl ketone oxime on the prevention of ink deposition is the best. Some ink manufacturers and packaging and printing operators believe that the anti gel effect of oxime compounds has exceeded the traditional phenolic compounds.
